REAL ESTATE OPERATIONS - Other Real Estate Assets (Details)	1 Months Ended		3 Months Ended
	Mar. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($) item	Mar. 31, 2020 USD ($) item	Mar. 31, 2019 USD ($)
Land and development costs and subsurface interests
Revenue from contract with customer, including assessed tax			$ 81,000	$ 235,000
Mitigation credits	$ 2,559,434	$ 2,322,596	2,559,434
Aggregate cost of sales			4,000	$ 0
Mitigation credits, Put Right, fair value	$ 1,500,000	$ 1,900,000	1,500,000
Number of mitigation credits | item	20	25
Mitigation credits value per credit.	$ 75,000	$ 75,000	75,000
Cost of revenues
Land and development costs and subsurface interests
Aggregate cost of sales			$ 1,500,000
Mitigation Bank
Land and development costs and subsurface interests
Number of mitigation credits acquired | item			20
Mitigation Credits Purchased			$ 1,500,000
Number of mitigation credits with cost basis | item			16
Amount of Mitigation Credits With Cost Basis			$ 1,200,000
Mitigation credits value per credit.	$ 75,000		$ 75,000
Mitigation Bank JV
Land and development costs and subsurface interests
Number of mitigation credits acquired | item			2
Mitigation Credits Purchased			$ 224,000
Impact Fee and Mitigation Credit Sales
Land and development costs and subsurface interests
Revenue from contract with customer, including assessed tax			$ 4,000